Elevator door



E L L E .E P a R & 2

ELEVATOR DOOR Filed March 5,

INVENTOR atented Feb. is, ieaa.

ROBERT S. PEELLE, OF HOLLIS, NEW YORK, ASSIGNOR TO THE PEELLE COMPANY,OI BROOKLYN, NEW YORK, A. CORPORATION OF NEW YORK.

ELEVATOR, DOOR.

To all whom it may concern: I

Be it known that I, Ronnn'r S. PEELLE, a citizen of the United States,residing at Hollis, in the borough of Queens, city of New York, countyof Queens, and State of New York, have invented certain new and usefulImprovements in Elevator Doors, of which the following is aspecification, reference being had therein to the accompanying drawings,which form a part thereof.

My invention relates to elevator doors, and more particularly to a typeof door having a metal frame carrying a metal sheathed wooden panel.

Heretofore in the art of fireproof elevator doors, it has been thecommon practice to secure the metal sheathed wooden panel to the ironangle frame of the door by means of ordinary stove bolts, with a flatwasher interposed between the nut and the metal sheathing of the door.In this construction, the floor side of the door has unsightlyprojections thereon extending beyond the plane of the door, whichprojections also cause likelihood of injury to persons on the floor sideof the door, or interference with objects close to the sill of the door.The use of the ordinary nut and washer also gives but a small grippingarea for the nut with a resultant likelihood of loosening thereofthrough vibration of the door structure.

If it be desired to reduce the extent of the projection of the boltstructure from the door, it is necessary to cut off the end of the boltsbeyond the nut, but even then the nut itself will project beyond theplaneof the door to the extent of the thickness of the nut and thewasher.

With these conditions in mind, I provide a door structure wherein thewooden panel will be secured to the angle, iron frame in a manner toavoid the presence of any unsightly projections upon the floor side ofthe door, while permitting the wooden panel to be drawn tightly againstthe angle frame. The securing means employed is such as to readily imbeditself in the wooden panel and to co-operate with the metal sheathing ina way to form a fireproof joint, the enlarged flat head of the nutpresenting a large hearing surface against the metal sheathed woodenpanel. This nut is so formed as to readily penetrate the wood ofv thepanel and Application filed March 5, 1920. Serial No. 363,530.

to wedge it apart in a manner to avoid the necessity for the formationof any countersinks, thus simplifying the assembling of the door andpreserving the metal sheathing between the nut and the wood adjacent thesurface of the door.

The invention consists primarily in an elevator door embodying therein ametal frame, a metal sheathed wooden panel, and means securing saidpanel to said frame comprising a screw bolt passing through said frameand said panel, and a nut having a truncated conical body adapted topenetrate the wood of the panel, and an enlarged head adapted to bearagainst the outer surface of the panel; and in such other novel featuresof construction and combination of parts as are hereinafter set forthand described, and more particularly pointed out in the claims heretoappended.

' Referring to the drawings,

Fig. 1 is a section through a portion of the edge ofa .door showing oneof the means for securing-the wooden panel to'the frame;

Fig. 2 is a perspective view of the nut upon an'enlarged scale;

. Fig. 3 is an end view of the nut from the head side; and

Fig. 4 is a side view of the nut, partly in elevation and partly insection.

Like letters. refer to like parts throughout the several views. 1

In theeinbodiment of the invention shown in the drawings 0; indicates anordinary angle frame for an elevator door having seated therein a woodenpanel I) covered by a metallic sheathing 0. Registering holes adapted toreceive a stove bolt d, are drilled through one flange of said frame andthrough the adjacent portion of the panel and its sheathing. Co-operating with the screw threaded end of the bolt (1 is a wedge nut,the body of which is adapted to penetrate the wood of the panel, and thehead of which is adapted to bear upon or be pressed slightly within theface of said pane adjacent the floor side of the door.

The body e of this nut is of truncated, conical form, the smaller endthereof being brought to a narrow edge, in fact almost a knife edge. Thehead f of the nut is a wide flange formed integrally with the body a Iinseam thereof and is provided withopenings f'--f adapted to receive aspanner wrench or other special tool for turning the nut.

The interior screw threads of said nut, shown at g, ass completelythrough said body and said flanged top, said top, if desired, beingprovided with a slight countersink or chamfer, indicated at h, to permitthe upsetting of the end of the bolt d to lock the nut in place andavoid any substantial ortion of the end of the bolt projecting beyondthe head of the nut. This chamfered portion, however, is a mere matterof convenience, and is not essential to the invention, particularly asthe frictional enga ement between the outer face of the body of the nut,and the metal sheathing and the wood of the panel will minimize anylikelihood of the loosening of the nut as a result of vibration.

In assembling the door structure, the bolt d is passed through theregistering openings in the frame a panel I) and sheathing a with thescrew threaded end thereof projecting slightly beyond the face of thepanel at the floor side of the door opening.

The reduced edge of the body portion 0 is then presented toward the doorand the nut mounted upon the bolt andtightened by means of a spannerwrench or special tool engaging the openings f'-f If found necessary,the metal sheathing about the bolt cl may be scored slightly tofacilitate the starting of the nut, although the pressure applied to thenut is ordinarily sufiicient to break down this sheathing close to thebolt. 7

As the nut is tightened, the twisting movement thereof as well as theco-operating screw threads will actually compress the fibers of thewooden panel and gradually force the metal sheathing inwardly so as toedectively protect the wood about the bolt d for a considerable depth.

The nut is tightened until the entire body thereof is well imbedded inthe wood of the panel I; and the head i thereof is partially or whollyimbedded in the surface of said panel.

The turning action of the nut will have a spinning efi'ect upon themetal of the sheathing so that no cracks or breaks will be developed inthe sheathing about the nut,

thus ensuring against the exposure of the wood through said sheathing.

When the nut has been tightened, the end of the bolt 0? may, if desired,be upset to lock the nut.

Since the body of the nut will engage the bolt well within the surfaceof the panel, shorter bolts may be used than was heretofore possible,the end of the bolt projecting beyond the face of the panel being merelysufficient to ensure the proper engagement of the threads of the nuttherewith,

there being little resistance ofiered to the nutduring the initial stageof the penetrationfof the bod thereof into the wooden panel.

An essential characteristic of the invention is the use of securingmeans between the metal frame and the metal sheathed woodon panel, whichin assembling the door will bring the nut structure substantially withinthe plane of the floor side of the panel without the necessity forforming countersinks in the material of said panel and withoutinterrupting the metallic sheathing in a manner to interfere with thefireproof qualities of the door.

It is not my intention to limit the invention to the precise details ofconstruction shown in the accompanying drawings, it being apparent thatsuch may be varied without departing from the spirit and scope of theinvention.

Having described the invention, what I claim as new and desire to haveprotected by Letters Patent, is

1. An elevator door embodying therein a metal frame, a metal sheathedwooden anel, a bolt passing through said metal rame and said panel, anda nut having a body portion imbedded in the wood of said panel,

and an enlarged head bearing upon the surface thereof, whereby thewooden portion of the'panel is compressed about said body portion andthe metal sheathing of the panel is deformed b and interposed between aportion of said bod portion of the nut and the wood of the 001'.

2. An elevator door embodying therein a metal frame, a metal sheathedwooden panel, and means securing said panel to said frame comprising ascrew bolt passing through said frame and said panel, and a nut having atruncated conical body penetrating and compressing the wood of the paneland deforming the metal sheathing and holding it interposed between aportion of said conical body and the compressed portion of the wood, andan enlarged head bearing against the outer surface of the panel.

3. An elevator door embodying therein a metal frame, a metal sheathedwooden panel, and means securing said panel to said frame comprising ascrew bolt passing through said frame and said panel, and a nut having atruncated conical body reduced to a narrow knife-like edge at thesmaller end thereof, penetrating and compressing the wood of the paneland defori'ning the metal sheathing and holding it interposed between aportion of said conical body and the compressed portion of the wood, andan enlarged head bearing against the outer surface of the panel.

. l. An elevator door embodying therein a metal frame, a metal sheathedwooden panel, and means securing said panel to said frame comprising ascrew bolt passing through said frame and said panel, and projectingslightly beyond the latter, and a nut havinga truncated conical bodypenetratix'ig and compressing the wood of the panel and deforming themetal sheathing and holding it interposed between a portion of saidconical body and the compressed portion of the wood, and an enlargedhead bearing against the outer surface of the panel, said nut having ascrew threaded opening extending longitudinally of said body and openinoutwardl of said head, said enlarged he being provided with meanswhereby a tool may be applied thereto for tightening said ROBERT S.PEELLE.

Witnesses:

F. T. WENTWORTH, A. E. BENTON.

